Speed-indicator.



H. G. THUESEN.

SPEED INDICATOR.

APPLICATION FILED MAR. 21. 1914. 1,159,551. Patented Nov. 9, 1915.

2 SHEET$SHEET 1.

Q UH 200 an H. e. THUESEN. SPEED INDICATOR.

APPLICATION FILED MAR. 21. I914- Patented Nov. 9, 1915 2 SHEETS-SHEET 2.

\l lllr Suva 14301 GHQ new wirneooeo HOLGER G. THUESEN, OF CEDAR FALLS,IOWA.

SPEED-INDICATOR.

Specification of Letters Patent.

Patented Nov. 9, 1915.

Application filed March 21, 1914. Serial No. 826,354.

To all whom it may concern Be it known that I, HQLGER G. THmisEN, acitizen of the United States, residing at Cedar Falls, in the county ofBlack Hawk and State of Iowa, have invented certain new and usefulImprovements in Speed-Indicators, of which thefollowing is aspecification.

Tire object of tlfis invention is to provide a speed indicator in suchassociated relation with a stop Watch or clock means that the operatorcan apply the indicator to the shaft or other revolving body andaccurately time the operation of the speed indicator so as to correctlyascertain the number of revolugions per minute of the" revolving shaftor ody. I

In the most preferred embodiment of my invention, I provide a speedindicator with a casing in which a stop watch or like clockwork meansmay be held, and I operatively connect the stop stem of the clock orWatch means with the speed indicator so that when the stem is actuated,the speed indicator will be released to be driven by the revolving bodyto which it has been applied, release of the stop stem serving to arrestthe indicator in order to permit of taking a reading.

Uther features and objects of my invention will be more fully describedin connection with the accompanying drawings and will be moreparticularly pointed out and ascertained in and by the appended claims.

In the drawings :Figure 1 is a view in side elevation illustrating oneform of my invention. Fig. 2 is a vertical sectional view thereof. Fig.dis a sectional view on line 33 of Fig. 2, with the operative connectionbetween the stop stem and the speed indicator, omitted. Fig. 4: is asectional view similar to Fig. 3, illustrating the operative connectionbetween the stop stem and speed indicator. Fig. 5 is a detail view of afriction member embodied in my invention.

Like characters of reference designate similar parts throughout thedifferent figures of the drawings.

'As illustrated, l designates a casing which is shaped to be held in thehand in the manner in which a pistol is held, a clock or watchcontaining portion 2 being adapted to be held abreast of the palm of thehand, and a speedometer containing portion 3 being adapted to projectupwardly between the body of the hand and the thumb, in a manher whichwill be ciear by reference to Fig. 1.

First, referring to the construction of the speed indicator, 4designates an indicating splndle having a suitably shaped and ifdesired, rubber tipped end 5 for engagement W1th the shaft or otherrevolving body for which a speed indication is desired. The spindle flis provided with a reduced end 6 which is ournaled in a suitable bearingformed in the casing 1, as will be seen by reference to Fig. 2. Thecasin 1 is also provlded with a bearing 7 in which a bushing 8 1sdisposed. The spindle 4 is provided with an annular groove 9 into whichthe reduced end of a screw 10 projects, the screw being inserted throughthe bearing 7 and the bushing 8, as illustrated in Fig. 2. A guard 11may have one end secured by the screw 10 and may be anchored to thecasing l at its other end by'a screw 12. The spindle 4 is provided witha worm 13 which meshes with a. worm wheel 14. The worm wheel liisloosely mounted upon a primary indicator shaft 15 which is provided W1tha shoulder 16. I have provided means for frictionally holding the Wormwheel in engagement with the shoulder 16 so as to drive the shaft 15,and as shown, I provide a spring cup 17 which engages the worm wheel H,as will be seen by reference to F g.3. The spring cup 17 seats on atrans- IIllSSlOD. indicator gear wheel 18 which is fixedly mounted uponthe shaft 15 and which is provided with a hub 19 extendinginto anopening in the casing 1, as will be seen by reference to Fig. 3. Theshaft 15 is journaled in the hub 19 and a screw 20, turned into theshaft 15, and overlapping the hub 19 and engaging the casing 1, forms anabutment for the hub 19 so that the cup spring 17 will lock wheel 14frictionally, to the shaft 15 to frictionally transmit rotation thereto.

The casing 1 which is suitably term the primary dial, and the shaft 15is provided with an indicating hand 22 which is movable abreast of thedial 21 and which I will term the primary indicating hand. A secondarydial 23 is mounted on the casing 1 and a secondary shaft 24: is alsomounted in the casing and carries a secondary indicating hand 25,movable over the dial 23. On the shaft 24, I mount a wheel 26, providedwith spaced teeth 27 The transmission wheel 18, is provided with asingle tooth 28 adapted to mesh with the teeth 27 is provided with adial 21,

graduated and which 1 will and the arrangement may be at any ratiodesired.

It Will be seen that the spring cup 17, coacts with the shaft 16 tofrictionally drive the same, by driving thrust imparted by the worm 13to the worm wheel 14:.

I fix upon the shaft 15, a stop wheel, which is shown in the form of aratchet wheel 29. The stop Watch shown is provided with a, stop stemhead 30 which projects into the space Surrounded by the guard 11 and thecasing 1. A lever 31 is pivotally mounted in the casing 1, as indicatedat 32, and one end of the lever is provided with a tooth 33 forengagement with the teeth of the stop ratchet 29. The other end of thelever 31 is adapted for engagement with the head 30 of the stop stem ofthe Watch. The Watch is shown provided with minute and hour hands 34:and 35, respectively, and also a stop hand 36.

If the gearing ratio of the speed indicator is one to one-hundred, andif'it is desired to take a speed indication for a time duration of oneminute, the operator will grasp the device in the manner in which apistol would be grasped and the end 5 will be applied to the rotativebody. Pressure will not, initially, be imposed on the lower end of stoplever 31 by the finger, and rotation of the spindle 4 which instantlytakes place upon application of the end 5, to the shaft, will simplyrevolve wheel 14 about the shaft 15, the latter being held againstrotation by the ratchet tooth 33, of lever 31. By pressure of theforefinger on lower end of lever 31, the latter will be rocked todisengage tooth 33 and depress the stop stem of the watch by engagementwith the head 30. By this means, the indicator is simultaneouslyreleased for action at the moment of actuation of the stop clock means.After the duration of time is indicated on the face of the clockorwatch, then pressure on the lever 31 is released thereby locking theindicator instantly to insure an accurate speed indication.

I11 order to enable the casing to receive a standard size stop watch, Imay make the casing 1 with a removable portion 37, to facilitateinsertion and removal ofthe watch.

It is believed that the advantages and utility of my invention will beclearly understood from the foregoing description and while I haveherein shown and described one specific form of my invention, I do notwish to belimited thereto except for such limitations as the claims mayimport.

I claim 1. In a time speed indicator, a casing, a stop watch mountedtherein having a controlling stem, a speed indicator means mounted insaid casing in proximity to said Watch, and a manually operableratchet-engaging member arranged to normally hold said speed indicatormeans against movement and to be manually moved to a position to releasesaid means and to exert operative action upon said stop watch.

2. In a time speed indicator, a casing, a stop watch mounted within saidcasing in operative position, a speed indicator means mounted in thecasing in proximity to said stop watch, a ratchet wheel carried by saidspeed indicator means, and manually operable means arranged to normallyengage with said ratchet wheel and hold the parts I 3. In a time speedindicator, a structure including a stop watch mounted in an operativerelation, a speed indicator embodying a spindle adapted to be applied toa rotating body and an indicator dial and hand arranged at a point thatthe spindle projects from the structure and the indicating dial is inproximity to the dial of said watch, ratchet means formed as a part ofsaid indicator means, and a manually operable ratchet engaging memberarranged to normally hold said speed indicator means against movementand be manually moved to a position to release said means and to exertoperative action upon said stop watch to thus permit simultaneous'movement thereof as the spindle is brought into turning relation with amoving part.

In testimony whereof I afiix my signature in presence of two Witnesses.

HOLGER G. THUESEN.

Witnesses W. N. HOSTROP, J. J. THUESEN.-

